Canon Speedlite Transmitter ST-E3-RT 5743B012 (Ver.2)

Fire multiple, compatible Speedlite flashguns over distances of up to 30m, with the Canon Speedlite Transmitter ST-E3-RT Version 2, for perfect remote flash photography made easy. The radio-frequency control provides reliable operation for up to 15 Speedlight flashes without needing a direct line of sight. Additional features are available when par... moretnered with the Speedlite EL-1 and later Speedlites. Canon Speedlite Transmitter ST-E3-RT Version 2 Fire multiple, compatible Speedlite flashguns over distances of up to 30m, with the Canon Speedlite Transmitter ST-E3-RT Version 2, for perfect remote flash photography made easy. The radio-frequency control provides reliable operation for up to 15 Speedlight flashes without needing a direct line of sight. Additional features are available when partnered with the Speedlite EL-1 and later Speedlites. Control settings from a distance 2.4GHz radio frequency triggering ensures reliable off-camera flash control, even with obstructions